We show that by using an iterative, digital restoration algorithm (Wiener or Kalman), it is possible to improve substantially the defocused optical transfer function of a previously apodized optical system. Consequently, high focal depth can be achieved by the use of an apodizer at the recording step, and a posteriori step of digital restoration. Computer-simulated images exhibit the focal depth achieved.
© 1988 Optical Society of America
Original Manuscript: June 8, 1987
Published: June 15, 1988
Jorge Ojeda-Castaneda, R. Ramos, and A. Noyola-Isgleas, "High focal depth by apodization and digital restoration," Appl. Opt. 27, 2583-2586 (1988)